Resumo

GARCIA-MATEOS, M. R. et al. Plant extracts for control of Colletotrichum gloeosporioides in vitro and flowering period and postharvest stage on Carica papaya.. Polibotánica [online]. 2021, n.51, pp.213-228.  Epub 06-Maio-2021. ISSN 1405-2768.  https://doi.org/10.18387/polibotanica.51.14.

The objective was to evaluate the activity of the extracts of six species for control in vitro on Colletotrichum gloeosporioides, and on papaya fruit (Carica papaya) during blooming period and postharvest stage. Evaluated variables were inhibition percentage and biological effectiveness for in vitro evaluation; incidence and biological effectiveness for field crop flowering stage evaluation and severity and effectiveness for postharvest fruits. Species’ extracts phytochemical analysis identified the presence of flavonoids in S. rostratum, and E. arvense; alkaloids in D. stramonium, M. parviflora, and A. ochroleuca; and terpenoids in P. icosandra. P. icosandra methanolic extract shown greater in vitro biological effectiveness against C. gloeosporioides fungus from remaining species, it was the only one evaluated during blooming period and postharvest stage, and was observed in blooming stage with a 60-70% effectiveness, where the flowers showed necrosis and rot (typical symptoms of the disease) and 71.4% in the control of anthracnose in postharvest fruits.

Palavras-chave : anthracnose; papaya; flowers; fruits; phytopathogenic fungi; terpenoids.

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